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7\sqrt{3}x-\sqrt{2}\times 3\sqrt{6}=7\times 2\sqrt{3}
Multiply both sides of the equation by 7.
7\sqrt{3}x-\sqrt{2}\times 3\sqrt{2}\sqrt{3}=7\times 2\sqrt{3}
Factor 6=2\times 3. Rewrite the square root of the product \sqrt{2\times 3} as the product of square roots \sqrt{2}\sqrt{3}.
7\sqrt{3}x-2\times 3\sqrt{3}=7\times 2\sqrt{3}
Multiply \sqrt{2} and \sqrt{2} to get 2.
7\sqrt{3}x-6\sqrt{3}=7\times 2\sqrt{3}
Multiply 2 and 3 to get 6.
7\sqrt{3}x-6\sqrt{3}=14\sqrt{3}
Multiply 7 and 2 to get 14.
7\sqrt{3}x=14\sqrt{3}+6\sqrt{3}
Add 6\sqrt{3} to both sides.
7\sqrt{3}x=20\sqrt{3}
Combine 14\sqrt{3} and 6\sqrt{3} to get 20\sqrt{3}.
\frac{7\sqrt{3}x}{7\sqrt{3}}=\frac{20\sqrt{3}}{7\sqrt{3}}
Divide both sides by 7\sqrt{3}.
x=\frac{20\sqrt{3}}{7\sqrt{3}}
Dividing by 7\sqrt{3} undoes the multiplication by 7\sqrt{3}.
x=\frac{20}{7}
Divide 20\sqrt{3} by 7\sqrt{3}.